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Mill Gap Road over Back Creek

Highland County, Virginia · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

Mill Gap Road over Back Creek in Highland County, Virginia, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 1930 and reconstructed in 1986, making it 95 years old at the 2025 inventory.
It carries about 319 vehicles a day (traffic count year 2022).
Its listed owner is the state highway agency.
It is one of 25 of the 53 inventoried bridges in Highland County rated fair (47.2%); 3 (5.7%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous steel stringer or multi-beam girder
Length	about 113 ft
Location	0.19 Rt 600 - 0.31 Rt 604
NBI structure number	000000000010212
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Virginia department of transportation.

Bridge	Built	Vehicles/day	Condition
Potomac River Road over S Branch Potomac River	1931	1,314	Fair
Potomac River Rd over Strait Creek	1931	1,314	Fair
Potomac River Road over E Branch Strait Creek	1931	1,314	Poor
Potomac Rver Road over Peck Run	2000	1,314	Good
Highland Tpke over Crab Run	1976	1,057	Fair
Rte 250 over Crab Run @ Mcdowell	2012	1,057	Good